The spiral galaxy M31 is the nearest example of this kind of galaxy. It
is inclined to our line of sight so that we can see structure in the
spiral arms as well as the central bulge. Observations of galaxies like
these can help us determine the structure of our own Galaxy, the Milky
Way.

This image shows M31 at a frequency of 408 MHZ (a wavelength of 74 cm), made using
the Cambridge One Mile Telescope, three telescopes operating together as an
interferometer, which was run by the MRAO.
The image clearly shows that, although the disk is clearly visible, the strongest
emission comes from the central bulge.